AD5744R Analog Devices, AD5744R Datasheet
AD5744R
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AD5744R Summary of contents
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... The AD5744R is a high performance converter that provides guaranteed monotonicity, integral nonlinearity (INL) of ±1 LSB, low noise, and 10 μs settling time. The AD5744R includes an on- chip 5 V reference with a reference temperature coefficient of 10 ppm/°C maximum. During power-up when the supply voltages are changing, VOUTx is clamped via a low impedance path. The AD5744R is based on the iCMOS® ...
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... AD5744R TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4 AC Performance Characteristics ................................................ 6 Timing Characteristics ................................................................ 7 Absolute Maximum Ratings.......................................................... 10 Thermal Resistance .................................................................... 10 ESD Caution................................................................................ 10 Pin Configuration and Function Descriptions........................... 11 Typical Performance Characteristics ........................................... 13 Terminology .................................................................................... 19 Theory of Operation ...................................................................... 21 DAC Architecture....................................................................... 21 Reference Buffers........................................................................ 21 Serial Interface ............................................................................ 21 Simultaneous Updating via LDAC ...
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... REG D REG D GAIN REG D REFERENCE LDAC Figure 1. Rev Page RSTOUT RSTIN REFAB VOLTAGE MONITOR AND CONTROL BUFFERS G1 DAC DAC DAC DAC D G2 TEMP BUFFERS SENSOR REFCD TEMP AD5744R ISCC VOUTA AGNDA VOUTB AGNDB VOUTC AGNDC VOUTD AGNDD ...
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... AD5744R SPECIFICATIONS −11 −16.5 V, AGND = DGND = REFGND = PGND = 0 V; REFAB = REFCD = 5 V external 2 5. kΩ LOAD Table 1. Parameter Min ACCURACY Resolution 14 Relative Accuracy (INL) −1 Differential Nonlinearity (DNL) −1 Bipolar Zero Error −2 −3 ...
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... V −16.5 V 5.25 V −85 dB 3.55 mA/channel 2.8 mA/channel 1.2 mA 275 mW Rev Page AD5744R 1 Test Conditions/Comments Per pin Per pin ± 5%, sinking 200 μ ± 5%, sourcing 200 μ 2 3.6 V, sinking 200 μ 2 3.6 V, sourcing 200 μA CC ...
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... AD5744R AC PERFORMANCE CHARACTERISTICS −11 −16.5 V, AGND = DGND = REFGND = PGND = 0 V; REFAB = REFCD = 5 V external 2 5. kΩ LOAD Table 2. Parameter 1 DYNAMIC PERFORMANCE Output Voltage Settling Time Slew Rate Digital-to-Analog Glitch Energy Glitch Impulse Peak Amplitude ...
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... SCLK rising edge to SDO valid ns min SYNC rising edge to SCLK falling edge μs max SYNC rising edge to DAC output response time (LDAC = 0) ns min LDAC falling edge to SYNC rising edge ) and timed from a voltage level of 1 Rev Page unless otherwise noted. AD5744R ...
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... AD5744R Timing Diagrams SCLK SYNC t 7 SDIN DB23 LDAC VOUTx LDAC = 0 VOUTx CLR VOUTx SCLK SYNC t 7 DB23 SDIN SDO LDAC DB0 Figure 2. Serial Interface Timing Diagram ...
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... REGISTER TO BE READ DB23 UNDEFINED Figure 4. Readback Timing Diagram 200µ OUTPUT PIN C L 50pF 200µ Figure 5. Load Circuit for SDO Timing Diagram Rev Page DB0 NOP CONDITION DB0 SELECTED REGISTER DATA CLOCKED OUT V (MIN (MAX) OL AD5744R ...
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... AD5744R ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. Transient currents 100 mA do not cause SCR latch-up. Table 4. Parameter Rating AV to AGND, DGND −0 + AGND, DGND +0 − DGND −0 Digital Inputs to DGND − ...
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... LDAC Figure 6. Pin Configuration 1 Asserting this pin sets the data register to 0x0000. . When programmed as outputs, D0 and D1 are referenced Rev Page AGNDA VOUTA VOUTB AGNDB AGNDC VOUTC VOUTD AGNDD and DGND. CC AD5744R ...
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... AD5744R Pin No. Mnemonic Description 23 VOUTA Analog Output Voltage of DAC A. Buffered output with a nominal full-scale output range of ±10 V. The output amplifier is capable of directly driving a 10 kΩ, 200 pF load. 24 AGNDA Ground Reference Pin for DAC A Output Amplifier. 25 REFAB External Reference Voltage Input for Channel A and Channel B. The reference input range and it programs the full-scale output voltage ...
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... REFIN = 5V –40 – TEMPERATURE (°C) Figure 11. Integral Nonlinearity Error vs. Temperature ± ±12V DD SS REFIN = 5V –40 – TEMPERATURE (°C) Figure 12. Integral Nonlinearity Error vs. Temperature ± AD5744R /V = ±12V 14,000 16,000 80 100 80 100 ...
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... AD5744R 0. ±15V 0.03 REFIN 0.02 0.01 0 –0.01 –0.02 –0.03 –0.04 –0.05 –0.06 –40 – TEMPERATURE (°C) Figure 13. Differential Nonlinearity Error vs. Temperature ± 0. ±12V REFIN 0.02 0.01 0 –0.01 –0.02 –0.03 –0.04 –0.05 –0.06 –40 – TEMPERATURE (°C) Figure 14 ...
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... Figure 22. Bipolar Zero Error vs. Temperature 1 REFIN 1.2 1 0.8 0.6 0 0.2 0 –0.2 –40 – TEMPERATURE (°C) Figure 23. Gain Error vs. Temperature T = 25° 0.5 1.0 1.5 2.0 2.5 3.0 3.5 V (V) LOGIC Figure 24. DI vs. Logic Input Voltage CC AD5744R /V = ±12V 100 = ±12V = ±15V SS 80 100 4.0 4 ...
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... AD5744R 7000 T = 25° REFIN 6000 5000 4000 3000 2000 1000 0 –1000 –10 –5 0 SOURCE/SINK CURRENT (mA) Figure 25. Source and Sink Capability of Output Amplifier with Positive Full Scale Loaded 10,000 T = 25° 9000 REFIN 8000 7000 6000 ±12V ...
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... LOAD CURRENT (µA) Figure 35. REFOUT Load Regulation 1 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 –40 – TEMPERATURE (°C) Figure 36. Temperature Output Voltage vs. Temperature AD5744R 18mV = 25° ±15V DD SS 160 180 200 = 25° ±15V 100 ...
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... AD5744R 5.003 5.002 5.001 5.000 4.999 4.998 4.997 –40 – TEMPERATURE (°C) Figure 37. Reference Output Voltage vs. Temperature 20 DEVICES SHOWN 60 80 100 Figure 38. Reference Output Temperature Drift (−40°C to +85°C) Rev Page MAX: 10ppm/°C TYP: 1.7ppm/°C ...
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... LSB maximum ensures monotonicity. This DAC is guaranteed monotonic. Monotonicity A DAC is monotonic if the output either increases or remains constant for increasing digital input code. The AD5744R is monotonic over its full operating temperature range. Bipolar Zero Error The deviation of the analog output from the ideal half-scale output when the data register is loaded with 0x8000 (offset binary coding) or 0x0000 (twos complement coding) ...
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... AD5744R Digital Crosstalk A measure of the impulse injected into the analog output of one DAC from the digital inputs of another DAC but is measured when the DAC output is not updated specified in nanovolt- seconds (nV-sec) and measured with a full-scale code change on the data bus; that is, from all 0s to all 1s, and vice versa. ...
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... DAC that operates from supply voltages of ±11 ±16.5 V and has a buffered output voltage ±10.5263 V. Data is written to the AD5744R in a 24-bit word format via a 3-wire serial interface. The AD5744R also offers an SDO pin that is available for daisy chaining or readback. The AD5744R incorporates a power-on reset circuit that ensures that the data registers are loaded with 0x0000 at power-up ...
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... For example, to read back the fine gain register of Channel A, implement the following sequence: 1. Write 0xA0XXXX to the input register. This write configures the AD5744R for read mode with the fine gain register of Channel A selected. Note that all the data bits, DB15 to DB0, are don’t care. 2. ...
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... TRANSFER FUNCTION Table 7 and Table 8 show the ideal input code to output voltage relationship for offset binary data coding and twos complement data coding, respectively. The output voltage expression for the AD5744R is given by V OUT where the decimal equivalent of the code loaded to the DAC. ...
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... AD5744R REGISTERS Table 9. Input Shift Register Format MSB DB23 DB22 DB21 R/W 0 REG2 Table 10. Input Shift Register Bit Function Descriptions Register Bit Description R/W Indicates a read from or a write to the addressed register REG2, REG1, REG0 Used in association with the address bits, determines if a read or write operation is to the data register, offset register, gain register, or function register ...
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... The fine gain register is addressed by setting the three REG bits to 100. The DAC address bits select the DAC channel with which the data transfer takes place (see Table 10). The AD5744R fine gain register is a 6-bit register that allows the user to adjust the gain of each DAC channel by − ...
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... DIGITAL I/O PORT The AD5744R contains a 2-bit digital I/O port (D1 and D0). RSTIN These bits can be configured independently as inputs or outputs and can be driven or have their values read back via the serial interface ...
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... There are four possible sources of error to consider when choosing a voltage reference for high accuracy applications: initial accuracy, temperature coefficient of the output voltage, long term drift, and output voltage noise. Table 18. Some Precision References Recommended for Use with the AD5744R Initial Accuracy Part No. (mV Maximum) ADR435 ± ...
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... RSTOUT RSTIN +15V –15V 10µF 10µF 100nF 100nF TEMP +5V 1 SYNC SCLK 2 3 SDIN SDO 4 AD5744R CLR 5 LDAC 10µF +5V +15V –15V Figure 43. Typical Operating Circuit Rev Page AGNDA ...
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... Design the PCB on which the AD5744R is mounted such that the analog and digital sections are separated and confined to certain areas of the board. If the AD5744R system where multiple devices require an AGNDx-to-DGND connection, establish the connection at one point only. Establish the star ground point as close as possible to the device. The AD5744R should have ample supply bypassing of 10 μ ...
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... AD5744R OUTLINE DIMENSIONS 1.05 1.00 0.95 0.15 0.05 VIEW A ROTATED 90° CCW ORDERING GUIDE 1 Model Function AD5744RCSUZ Quad 14-Bit DAC AD5744RCSUZ-REEL7 Quad 14-Bit DAC RoHS Compliant Part. 1.20 0.75 MAX 0.60 0. 0° MIN 0.20 0.09 7° 3.5° 8 0° 9 SEATING 0.08 MAX PLANE COPLANARITY VIEW A LEAD PITCH COMPLIANT TO JEDEC STANDARDS MS-026-AB A Figure 45 ...
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... Data Sheet NOTES Rev Page AD5744R ...
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... AD5744R NOTES ©2008–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06065-0-9/11(E) Rev Page Data Sheet ...